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