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