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)(11,13,15,16)(17,18,23,25)(19,26,20,22)(21,24,29,31)(27,32,28,30)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19,22,18,23,20,26,25)(21,27,30,24,29,28,32,31)(1,3,4,7)(2,6,5,8)(11,15)(13,16)(17,20,22,25,23,19,26,18)(21,28,30,31,29,27,32,24)(11,15)(13,16)(17,21)(18,24)(19,27)(20,28)(22,30)(23,29)(25,31)(26,32) involution — undirected(21,29)(24,31)(27,28)(30,32) 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.