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