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