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