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