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