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