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