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