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