Do you have a decent air gauge - if not get one as the station pumps are usually inaccurate. Check tires cold, after sitting overnight is best, at home and note pressure in each. If low or imbalanced (different pressure(s) in one or more tires) note which tire is closest to 32 psi take it to station and check tire pressure in tire that was closest to 32 psi and increase or lower pressure by that amount, then set all others to that pressure. Example - if "best tire" was 31 psi cold at home and 34 psi when you got to the pump, inflate all tires to 35 psi and they should be near 32 psi cold. If one or more tires were "imbalanced", suggest rechecking after a couple of days to be sure you don't have a slow leak. The rule of thumb is to check them at least once a month. I do for the first few months then go from season to season if they don't leak. The other rule of thumb is you gain or lose 1 psi for each 10 degrees (the cold reading) temperature changes - if it's 40 degrees hotter the tire pressure could be 4 psi higher.
