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