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