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)(23,36)(25,30)(29,43)(31,40)(32,38)(33,41)(34,37)(35,42)(39,46)(44,48)(45,47)(1,3,5,8)(2,6,4,7)(9,11,14,10)(12,15,13,16)(18,24)(20,32)(25,37)(27,36)(28,40)(29,44)(33,35)(45,46)(9,12)(10,15)(11,16)(13,14)(17,19,21,34,22,31,23,30)(18,25,36,40,24,37,27,28)(20,29,35,45,32,44,33,46)(26,39,41,48,38,47,42,43)(1,4,5,2)(3,6,8,7)(9,13,14,12)(10,16,11,15)(17,20,22,32)(18,26,24,38)(19,29,31,44)(21,35,23,33)(25,39,37,47)(27,42,36,41)(28,43,40,48)(30,46,34,45)(10,11)(15,16)(17,21,22,23)(18,27,24,36)(19,30,31,34)(20,33,32,35)(25,40,37,28)(26,41,38,42)(29,45,44,46)(39,43,47,48)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.