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