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