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)(17,18,22,25)(19,27,31,40)(20,24,32,38)(21,34,35,26)(23,29,37,30)(28,41,43,48)(33,46,45,39)(36,42,47,44)(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)(20,32)(24,38)(28,43)(33,45)(36,47)(39,46)(41,48)(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.