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