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