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