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