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