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