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)(11,15)(12,14)(13,16)(17,18,21,23)(19,26,27,32)(20,28,29,24)(22,31,30,25)(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,16)(14,15)(18,23)(19,27)(24,28)(25,31) involution — undirected(1,2)(3,5)(4,6)(7,8)(11,16)(13,15)(17,19,22,24,21,27,30,28)(18,20,25,26,23,29,31,32)(2,6)(5,7)(10,14)(13,15)(17,20,21,29)(18,24,23,28)(19,25,27,31)(22,26,30,32)(3,8)(5,7)(19,27)(20,29)(24,28)(26,32) 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.