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