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