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