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