Ideally this link should be in the footer of every page (along with many of our other standard footer sites). At a minimum it should be in the FAQ/About page where there seems to be a fresh document that is trying to define a CoC instead of our CoC.
(unrelated - the cakeday link was slightly disappointing)
– your F-Cake 
There is one in the Terms of Service - Fedora Discussion, which is linked from About in the menu. But I agree we should make it more prominent.
Sorry for necro-ing this topic… but the Ask Fedora site has a Code of Conduct link in the top bar, and so I suspect this site can have it there too, and that would be about as prominent as possible. The ‘Discussion Channels’ link on that site might also be useful in the top bar here.