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