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