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