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