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