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