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