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