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