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