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