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