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