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