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