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