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