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