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