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