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