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