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