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