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