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