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