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