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