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