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