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)(7,12)(13,15)(14,16)(19,25)(20,27)(22,30)(23,28)(26,29)(31,32) involution — undirected(1,3)(2,7)(4,12)(5,13)(6,14)(8,11)(9,16)(10,15)(17,18,21,24)(19,22,26,31)(20,28,27,23)(25,32,29,30)(1,2)(3,7)(4,9)(5,8)(6,10)(11,13)(12,16)(14,15)(17,19)(18,22)(20,29)(21,26)(23,32)(24,31)(25,27)(28,30) involution — undirected(1,4,6,5)(2,8,10,9)(3,12,14,13)(7,11,15,16)(1,4,6,5)(2,9,10,8)(3,13,14,12)(7,11,15,16)A 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.