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