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