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