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