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