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