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