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