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