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