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