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