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