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)(19,28,30,40)(20,32,35,43)(21,25,36,26)(23,37,39,31)(24,41,44,34)(29,42,33,38)(45,48,47,46)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,21,31,22,30,36,37)(18,23,26,28,27,39,25,40)(20,33,34,48,35,29,41,46)(24,42,32,47,44,38,43,45)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,21,34,22,35,36,41)(18,24,26,32,27,44,25,43)(19,29,31,46,30,33,37,48)(23,38,28,45,39,42,40,47)(1,4,5,3)(2,8,6,7)(9,11)(10,14)(12,15)(13,16)(19,30)(23,39)(28,40)(29,33)(31,37)(38,42)(45,47)(46,48)(11,15)(14,16)(17,21,22,36)(18,25,27,26)(19,31,30,37)(20,34,35,41)(23,40,39,28)(24,43,44,32)(29,46,33,48)(38,47,42,45)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.