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