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