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)(19,25)(20,22)(21,29)(23,27)(24,28)(26,31)(30,32) involution — undirected(1,3,4,11,5,12,10,16)(2,6,8,9,7,14,13,15)(18,22)(19,26)(21,28)(23,30)(2,7)(6,14)(8,13)(9,15)(17,19,21,27,20,26,28,32)(18,23,24,25,22,30,29,31)(1,3,10,16,5,12,4,11)(2,6,13,15,7,14,8,9)(18,22)(23,30)(24,29)(25,31)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.