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