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