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