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