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