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