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