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