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