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