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