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