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