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