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