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