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