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