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