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