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