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