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