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