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