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