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