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