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