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