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