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