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