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