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