One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,9,4,11,17,33,5,13,18,35,21,40,47,59,6,14,19,32,22,41,46,58,23,30,48,55,50,38,62,63,7,12,16,34,20,39,44,60,24,28,45,31,49,56,64,57,25,10,15,36,42,37,43,61,51,8,26,27,52,29,53,54)(2,8,10,28,12,30,14,13)(3,15,16,19)(4,20)(9,31,32,27,34,35,36,55)(11,38,37,40,39,29,41,56)(17,46,44,43)(18,26,45,48)(21,49)(22,42)(33,59,58,63,60,57,61,54)(47,62,64,53)(50,52)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.