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