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