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)(35,43)(36,47,50,40)(37,51)(38,42)(39,45)(41,53)(44,59,48,64)(46,60)(49,57,52,58)(54,61,56,62)(55,63)(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)(33,35,37,45,38,46,53,63)(34,39,41,43,42,55,51,60)(36,48,49,62,50,44,52,61)(40,56,57,59,47,54,58,64)(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)(34,40)(35,44)(37,52)(38,50)(39,54)(41,58)(42,47)(43,59)(45,62)(46,48)(49,53)(51,57)(55,56)(60,64)(61,63) 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.