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