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