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