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