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