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