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