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