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