Ideally you want to set the tyre pressures to your own car and drivingstyle. However, if its basic settings and you are driving on the streets then around 30psi will be fine. Different if you are taking the car to a track or racing.
If you want to fine tune for optimum handling, response and feedback then set at 30psi all round take for a drive, get tyres warm, move the front and rears up and down by 2psi until you are happy with the way it goes.
Remember to check your pressure when the tyres are hot.