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