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)(17,18,23,28)(19,29,30,25)(20,26,22,32)(21,31,24,27)(9,11)(10,13)(12,16)(14,15)(17,19)(18,25)(20,21)(22,24)(23,30)(26,27)(28,29)(31,32) involution — undirected(2,5)(6,8)(10,14)(11,16)(17,20,21,19,23,22,24,30)(18,26,31,29,28,32,27,25)(10,14)(13,15)(17,21,23,24)(18,27,28,31)(19,20,30,22)(25,26,29,32)(1,3,4,7)(2,6,5,8)(17,22,24,19,23,20,21,30)(18,26,27,25,28,32,31,29)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.