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