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