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