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