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