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