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