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