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