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