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