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