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