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