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