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