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