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