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)(17,18,23,28,24,29,22,39)(19,30,32,27,33,46,21,25)(20,26,36,44,37,45,40,43)(31,47,35,42,34,48,38,41)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16)(17,19,24,33)(18,25,29,27)(20,34,37,31)(21,22,32,23)(26,42,45,41)(28,46,39,30)(35,40,38,36)(43,48,44,47)(2,6)(5,7)(9,11,12,16)(10,13,14,15)(17,20,24,37)(18,26,29,45)(19,31,33,34)(21,38,32,35)(22,40,23,36)(25,41,27,42)(28,44,39,43)(30,47,46,48)(3,8)(5,7)(11,16)(13,15)(17,21,23,19,24,32,22,33)(18,27,28,46,29,25,39,30)(20,35,36,34,37,38,40,31)(26,41,44,47,45,42,43,48)(10,14)(13,15)(17,22,24,23)(18,28,29,39)(19,21,33,32)(20,36,37,40)(25,30,27,46)(26,43,45,44)(31,35,34,38)(41,48,42,47)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.