It'll depend on board texture a lot (the wetter the board, the faster you want to play the nuts) and opponent type.
I'll go with this .
but having in mind that you have to play them and get paid , put chips on the pot , not slow play them , even if you have the nut flush on the flop , why lose a bet ''turn'' , bet , cause you don't know the cards of the opponent and you don't know if the board cards will get paired if he has set ,etc .
It depends ofcourse on the preflop action . If you have raised you can cbet the nuts and expect a villain'sbluff . If not maybe try check on the flop if the villain is nit , or hand-identifier small donkey bet .
Of course if out of position , if he just checks you raise , if he raise you call , if he min raise you raise . I have failed some times with the nuts , and believe me , it's no good memories , so bet even if the other is very tight , don't give him free cards , I try to remind this to myself all the time
I had sets 1 week ago on the flop, full boat on the turn , but I was just checking not to scare him , expecting the other to take the initiative and bet , he did it only on the flop , I lost value , Ihad KK , he had AK , 2K10 rainbow on the flop ,2on the turn ,whatever cardv on the turn, that's no the way to play it , in the end I took only 1/4 of his stack instead of 1/2-2/3 or all????(preflop he reraise me big x3, I thought << now we have ''EL CLASICO , AA-KK ''>>).So don't expect the other to bluff you and take the initiative bets instead of you .
Now if is/it's better than full house and the other HAS NOT bet/raised and the flop is not wet , you can try to play more carefully/less aggressive . In cash games you don't have to be so strict , you can play if you have the nuts a bit less aggressive , but only a bit he?