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