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