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