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