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