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