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