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