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