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