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)(17,18,20,23)(19,25,22,30)(21,24,28,31)(26,27,32,29)(1,3,5,12)(2,6,7,15)(4,10,14,11)(8,16,13,9)(18,23)(24,31)(25,30)(26,32)(18,24)(19,22)(21,29)(23,31)(25,26)(27,28)(30,32) involution — undirected(2,7)(3,10)(4,14)(6,9)(11,12)(15,16)(17,19,20,22)(18,25,23,30)(21,27,28,29)(24,32,31,26)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.