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