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