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