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