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