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