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