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