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