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