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