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