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