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