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