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