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