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