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