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