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