Withdrawals to and payments from PayPal are usually instantaneous. Meaning that you should see your withdrawal in 5-15 minutes.
If you can't see your withdrawal or payment (deposit) it is probably because you have not claimed the payment yet. This happens if the recipient (you) hasn't accepted the payment or has not confirmed the PayPal email address. You can do this by verifying your PayPal email address or by logging into your PayPal account and accepting the Payment.
You get more help on how to do that here.