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)(18,23)(19,26)(20,21)(25,29)(28,30)(31,32) involution — undirected(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,18)(19,27)(20,23)(21,29)(22,25)(24,28)(26,32)(30,31) involution — undirected(11,15)(13,16)(17,19)(18,24)(20,26)(21,30)(22,28)(23,31)(25,27)(29,32) involution — undirected(10,14)(13,16)(17,20,22,21)(18,23,25,29)(19,26,28,30)(24,31,27,32)(1,3,4,7)(2,6,5,8)(18,25)(23,29)(24,27)(31,32)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.