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