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