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