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