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