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