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