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