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