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