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