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