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