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