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