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