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