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