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