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)(10,16)(11,15)(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)(11,13)(14,16)(17,19)(18,23)(20,30)(21,29)(22,28)(24,32)(25,27)(26,31) involution — undirected(1,3)(2,7)(4,13)(5,10)(6,14)(8,15)(9,16)(11,12)(18,24)(20,21)(23,27)(25,26)(29,30)(31,32) involution — undirected(3,10)(7,16)(11,13)(14,15)(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.