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