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)(11,14)(12,13)(15,16)(17,18,23,28,24,29,22,27)(19,30,32,40,33,46,21,25)(20,26,36,44,37,45,35,43)(31,41,34,42,47,48,38,39)(2,5)(6,8)(17,19,24,33)(18,25,29,40)(20,34,37,38)(21,22,32,23)(26,41,45,48)(27,30,28,46)(31,35,47,36)(39,43,42,44)(10,13)(14,16)(17,20,22,35,24,37,23,36)(18,26,27,43,29,45,28,44)(19,31,21,38,33,47,32,34)(25,39,46,48,40,42,30,41)(1,3,4,7)(2,6,5,8)(17,21,23,19,24,32,22,33)(18,25,28,30,29,40,27,46)(20,34,36,47,37,38,35,31)(26,42,44,48,45,39,43,41)(9,11,12,15)(10,14,13,16)(17,22,24,23)(18,27,29,28)(19,32,33,21)(20,35,37,36)(25,30,40,46)(26,43,45,44)(31,34,47,38)(39,41,42,48)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.