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