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