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