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