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