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