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