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