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