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