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