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