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