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