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