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