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