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