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