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