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)(17,18,24,30)(19,31,35,48)(20,36,40,44)(21,28,37,42)(22,27,32,47)(23,41,38,29)(25,39,45,33)(26,46,43,34)(2,5)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,22,20,23,34,37,39,24,35,32,40,38,46,21,33)(18,25,28,43,29,44,47,48,30,45,42,26,41,36,27,31)(11,15)(13,16)(17,20,37,35,38,33,22,34,24,40,21,19,23,39,32,46)(18,26,47,25,41,48,28,36,30,43,27,45,29,31,42,44)(1,3,4,8)(2,6,5,7)(17,19,32,40,23,34,21,33,24,35,22,20,38,46,37,39)(18,25,42,26,29,44,27,31,30,45,28,43,41,36,47,48)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.