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