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