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