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