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