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