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