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