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