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