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