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