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