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