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