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