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