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