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