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