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