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