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