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