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