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