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