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