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