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