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