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