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