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