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