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