One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(17,18,22,25)(19,26,28,24)(20,23,32,21)(27,30,31,29)(1,3,4,8)(2,5,6,7)(9,10)(11,15)(12,16)(13,14)(17,19)(18,24)(20,31)(21,29)(22,28)(23,30)(25,26)(27,32)(3,8)(5,7)(10,14)(15,16)(17,20,23,25,22,32,21,18)(19,27,30,24,28,31,29,26)(2,6)(5,7)(9,11,13,12)(10,15,14,16)(18,25)(19,28)(20,32)(29,30)(9,12,13,11)(10,15,14,16)(17,21,22,23)(18,20,25,32)(19,29,28,30)(24,31,26,27)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.