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