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