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