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