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