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