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