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