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