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