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