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