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