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