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