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