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)(17,18)(19,27,28,32)(20,25,21,24)(22,26)(23,30)(29,31)(1,3)(2,6)(4,12)(5,11)(7,14)(8,16)(9,15)(10,13)(17,19)(18,23,26,31)(20,29)(21,30)(22,28)(24,32,25,27)(2,7)(6,14)(8,15)(9,16)(19,28)(23,31)(27,32)(29,30) involution — undirected(17,20,22,21)(18,24,26,25)(19,29,28,30)(23,32,31,27)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.