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