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