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