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