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