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