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