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