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