I can't vouch for the products you guys may have access to, but in my book, as an operator, the time you are at most risk is when you are loading the actual concentrates into the sprayer or tank. This is where you are going to contaminate yourself with splashes or dusts.
In the UK the general rules are, plastic/tyvek coveralls, decent gloves that extend up past the wrist, and a visor to stop anything splashing in your eyes. A mask will be needed if handling anything dusty.
You are only supposed to wear this gear when loading the stuff in or say playing with the sprayer nozzles or pipework half way through the job. The rest of the time the gear is living on a separate little locker on the sprayer, and certainly should not be worn in the cab as you will certainly contaminate your seat, controls etc if you do get splashed with something and don't notice.
Provided you have correctly fitted windows and doors, which seal properly, and your air con is working well, and you have decided to actually use an activated carbon cab filter and change it once in a blue moon, the dilute spray solution shouldn't offer as much harm, but obviously do your best to avoid spraying your dog, or next door neighbours garden.
In fairness, a lot of this might be unnecessary, as our chemical regs are now so tight that sprays are a lot safer to the operator or they would not be approved for sale. That said, you can't go wrong pretending it is all as lethal as sarin gas.
One thing I will say is be very wary of any kind of insecticidal product, in particular organophosphates and carbamates. Whilst you would need a heck of a dose of either of these to kill a human being through a single acute exposure, some people are very sensitive to them and don't react well to them at all. Also there is a raft of evidence about what happens to mammals exposed to them long term.
Stay safe out there.