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