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