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