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