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)(11,15,16,13)(19,26)(24,31)(27,32)(28,30)(1,3)(2,5)(4,8)(6,7)(17,18)(19,27)(20,22)(21,23)(24,28)(25,29)(26,32)(30,31) involution — undirected(9,11,12,16)(10,13,14,15)(18,22)(20,29)(23,25)(24,27)(28,30)(31,32)(2,6)(5,7)(18,23)(19,26)(22,25)(28,30) involution — undirected(3,8)(5,7)(17,19,21,26)(18,24,23,31)(20,30,29,28)(22,27,25,32)A 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.