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