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