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