If you remove the bandages, it will fill back up. This is fine, if you are either willing to have cauliflower ear permanently, or to drain it yourself. When it fills, if it stays that way, it will re-harden into that shape. So, to drain it yourself, clean the area w/ alcohol, drain with syringe, and use antiseptic/bandage.
The trick is to keep it compressed and closed after so it can't refill. The doctor did that with his sutures or bandages, but you will need another way. Some people like clothespins or binder clips, but I find that they are either the wrong shape and slip off, are too loose, or are so tight that my ear goes numb, and I can't tell if it stays on. I like to use nosebleed clamps, which are basically a plastic clamp with 2 pads that go over your nostrils. I had to order mine from Japan. They look like this:
http://www.amazon.com/Nose-Aid-Emerg.../dp/B001B5OZEU