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