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)(20,31,29,40,33,42,37,25)(21,34,35,38,36,26,30,41)(32,45,43,39,47,44,46,48)(2,5)(3,7)(9,11)(10,13)(12,16)(14,15)(17,19,23,22)(18,24,28,27)(20,29,33,37)(21,30,36,35)(25,31,40,42)(26,38,34,41)(32,43,47,46)(39,44,48,45)(11,16)(13,15)(17,20,23,33)(18,25,28,40)(19,29,22,37)(21,32,36,47)(24,31,27,42)(26,39,34,48)(30,43,35,46)(38,44,41,45)(2,5)(6,8)(10,14)(13,15)(17,21)(18,26)(19,30)(20,32)(22,35)(23,36)(24,38)(25,39)(27,41)(28,34)(29,43)(31,44)(33,47)(37,46)(40,48)(42,45) involution — undirected(1,3,4,7)(2,6,5,8)(17,19,23,22)(18,24,28,27)(20,29,33,37)(21,35,36,30)(25,31,40,42)(26,41,34,38)(32,46,47,43)(39,45,48,44)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.