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