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