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