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