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