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