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