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