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