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