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