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