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