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