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