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