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