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