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