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