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