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