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