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