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