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