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