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