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