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