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