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