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