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