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