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