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