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