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