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)(11,14)(12,13)(15,16)(17,18,23,20)(19,24,30,31)(21,25,29,27)(22,26,28,32)(2,6)(7,8)(17,19,23,30)(18,24,20,31)(21,28,29,22)(25,32,27,26)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(17,20,23,18)(19,27,30,25)(21,31,29,24)(22,26,28,32)(9,11,12,15)(10,14,13,16)(17,21)(18,25)(19,28)(20,27)(22,30)(23,29)(24,32)(26,31)(1,4,5,3)(2,8,6,7)(19,21)(22,28)(24,25)(26,32)(27,31)(29,30)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.