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