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