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