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