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