Is swelling of the ear normal after otoplasty surgery? It looks like I have cauliflower ear and it's been three days post op.

During the first week after an otoplasty, you should be wearing a head dressing to keep pressure on the ear to protect the ears and prevent a hematoma.  Swelling in the ear after an otoplasty should be minor.  If you ear appears very swollen, you need to see your otoplasty surgeon ASAP.  You may have a hematoma that need to be drained to prevent permanent damage to your ear.  I hope this helps  

Some degree of swelling is certainly expected after otoplasty.    However,  swelling that resembles cauliflower ear could indicate a hematoma that needs to be drained to avoid scaring.   I suggest you get that checked out ASAP.