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