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