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