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