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