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