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)(17,18,20,22)(19,25,27,23)(21,24,28,30)(26,31,29,32)(2,6)(7,8)(9,11,14,10)(12,15,13,16)(18,22)(19,26)(21,28)(23,31)(25,32)(27,29)(1,3,5,4)(2,7,6,8)(9,12,14,13)(10,15,11,16)(18,22)(23,25)(24,30)(31,32)(1,3,5,4)(2,7,6,8)(9,13,14,12)(10,16,11,15)(17,19,20,27)(18,23,22,25)(21,29,28,26)(24,31,30,32)(1,4,5,3)(2,7,6,8)(18,22)(23,25)(24,30)(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.