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