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