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