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