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)(17,18,21,24)(19,25,27,22)(20,23,28,30)(26,31,32,29)(2,6)(7,8)(9,11,14,10)(12,15,13,16)(19,26)(20,28)(22,29)(23,30)(25,31)(27,32)(1,3,5,4)(2,7,6,8)(9,12,14,13)(10,15,11,16)(9,13,14,12)(10,16,11,15)(17,19,20,26,21,27,28,32)(18,22,23,29,24,25,30,31)(1,4,5,3)(2,7,6,8)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.