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