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