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