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