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