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