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