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