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