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