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