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