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