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