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)(17,18)(19,22)(20,23)(21,24)(25,30)(26,29)(27,31)(28,32)(1,3,5,11)(2,6,8,15)(4,13,14,10)(7,16,12,9)(17,19)(18,22)(20,25)(21,26)(23,30)(24,29)(27,32)(28,31)(4,14)(6,15)(7,12)(10,13)(17,20)(18,23)(19,25)(21,27)(22,28)(24,31)(26,32)(29,30) involution — undirected(20,27)(23,31)(25,32)(28,30) 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.