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