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