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