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