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