One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,9,5,10,17,27,6,11,18,28,20,30,39,49,7,12,19,29,21,31,40,50,22,32,41,51,42,52,57,62)(3,8,14,24,15,25,36,46,16,26,37,47,38,48,56,61,13,23,33,43,34,44,53,58,35,45,54,59,55,60,63,64)(65,66,67)(1,3)(2,8)(4,14)(5,15)(6,16)(7,13)(9,24)(10,25)(11,26)(12,23)(17,36)(18,37)(19,33)(20,38)(21,34)(22,35)(27,46)(28,47)(29,43)(30,48)(31,44)(32,45)(39,56)(40,53)(41,54)(42,55)(49,61)(50,58)(51,59)(52,60)(57,63)(62,64) involution — undirected(3,13)(8,23)(14,33)(15,34)(16,35)(24,43)(25,44)(26,45)(36,53)(37,54)(38,55)(46,58)(47,59)(48,60)(56,63)(61,64) involution — undirectedA 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.