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)(11,13)(12,14)(15,16)(17,18,22,29,21,37,38,48,25,31,23,30,24,28,39,42)(19,26,33,44,36,43,40,27,20,35,34,45,32,46,41,47)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19,22,33,21,36,38,40,25,20,23,34,24,32,39,41)(18,26,29,44,37,43,48,27,31,35,30,45,28,46,42,47)(1,3)(2,6)(4,7)(5,8)(10,14)(13,16)(17,20,25,19)(18,27,31,47)(21,36,24,32)(22,40,23,41)(26,42,35,48)(28,45,37,44)(29,43,30,46)(33,39,34,38)(3,7)(6,8)(17,21,25,24)(18,28,31,37)(19,32,20,36)(22,38,23,39)(26,43,35,46)(27,45,47,44)(29,42,30,48)(33,41,34,40)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.