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