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