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