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