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