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)(18,22)(19,25)(24,29)(26,32) involution — undirected(2,6)(7,8)(9,10,13,16)(11,15,12,14)(18,22)(19,26)(21,27)(23,30)(25,32)(28,31)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,14,16,15)(17,18)(19,23)(20,22)(21,24)(25,28)(26,31)(27,29)(30,32)(9,12,13,11)(10,15,16,14)(17,19,27,32,20,25,21,26)(18,23,29,30,22,28,24,31)(1,4,5,3)(2,7,6,8)(18,22)(23,28)(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.