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