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)(19,28)(21,31)(23,32)(25,29)(9,11)(10,13)(12,16)(14,15)(17,18)(19,29)(20,24)(21,23)(22,26)(25,28)(27,30)(31,32) involution — undirected(2,5)(6,8)(10,14)(11,16)(17,19,30,31,22,28,20,21)(18,23,24,25,26,32,27,29)(10,14)(13,15)(17,20,22,30)(18,24,26,27)(19,21,28,31)(23,25,32,29)(1,3,4,7)(2,6,5,8)(17,21,20,28,22,31,30,19)(18,25,27,23,26,29,24,32)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.