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