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