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