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