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