One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,13,8,15,33,14)(3,16,21,48,20,43,22,35)(4,23,27,58,26,45,60,39)(5,12,29,11,30,44,6,31)(9,19,37,18,36,55,46,28)(10,38,41,32,40,24,42,25)(17,49,52,64,54,34,53,61)(47,59,57,56,63,50,62,51)(1,3,5,28,7,22,29,55,8,20,30,18,33,21,6,19)(2,9,31,16,14,37,44,48,15,36,11,43,13,46,12,35)(4,17,38,50,27,53,32,56,26,54,24,59,60,52,25,51)(10,34,39,63,42,61,45,62,40,49,58,47,41,64,23,57)(1,4,5,24,7,27,29,25,8,26,30,38,33,60,6,32)(2,10,11,39,14,42,12,45,15,40,31,58,13,41,44,23)(3,17,18,50,22,53,19,56,20,54,28,59,21,52,55,51)(9,34,16,47,37,61,48,57,36,49,43,63,46,64,35,62)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.