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)(17,18,22,20,21,24,31,30)(19,25,28,26,27,23,32,29)(1,3,6,2)(4,7,5,8)(11,16)(13,15)(9,11,12,16)(10,13,14,15)(17,19,21,27)(18,23,24,25)(20,29,30,26)(22,28,31,32)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,20,22,24,21,30,31,18)(19,26,28,23,27,29,32,25)(1,5,6,4)(2,7,3,8)(19,27)(23,25)(26,29)(28,32)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.