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