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