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