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