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