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