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