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