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