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