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