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