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