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