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)(19,25)(20,22)(21,29)(23,27)(24,28)(26,32)(30,31)(1,3,10,14,5,12,4,11)(2,6,13,16,8,15,7,9)(18,22)(23,31)(24,29)(25,32)(17,19)(18,23)(20,26)(21,30)(22,31)(24,32)(25,29)(27,28) involution — undirected(21,28)(24,29)(25,32)(27,30) 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.