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