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