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