Just FYI, All tires are marked on the sidewall with the max pressure. Your most accurate is to check the pressure while the tires are cold. They will inflate after driving.....very hot climates such as here in AZ, up to 10 pounds or so, not as much in cooler climates.
Max pressure = Most Tire Life
You can safely play with less pressure a bit to give a more comfortable ride.
On a 35# tire, 32 or so is a happy medium as the others have posted.