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