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