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