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