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