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