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