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