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