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