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