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)(33,34,39,44)(35,40,46,54)(36,49,51,58)(37,43,38,42)(41,52,57,50)(45,59,60,64)(47,56,48,55)(53,62,63,61)(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)(34,40)(36,45)(37,47)(38,48)(39,46)(41,53)(42,55)(43,56)(44,54)(49,59)(50,61)(51,60)(52,62)(57,63)(58,64)(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)(34,41)(35,45)(37,50)(38,52)(39,51)(40,53)(42,49)(43,58)(44,57)(46,60)(47,61)(48,62)(54,63)(55,59)(56,64) involution — undirected(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)(35,46)(40,54)(45,60)(47,48)(53,63)(55,56)(59,64)(61,62)(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)(33,37,39,38)(34,42,44,43)(35,47,46,48)(36,50,51,52)(40,55,54,56)(41,49,57,58)(45,61,60,62)(53,59,63,64)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.