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