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