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