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