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