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