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