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