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