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)(11,14)(12,13)(15,16)(17,18)(19,23)(20,25)(21,24)(22,26)(27,31)(28,30)(29,32)(2,6)(7,8)(17,19,21,29)(18,23,24,32)(20,27,28,22)(25,31,30,26)(1,3,5,4)(2,7,6,8)(10,13)(14,16)(18,24)(19,20)(22,27)(23,30)(25,32)(28,29)(1,3,5,4)(2,7,6,8)(9,11,12,15)(10,14,13,16)(17,20)(18,25)(19,27)(21,28)(22,29)(23,31)(24,30)(26,32)(1,4,5,3)(2,8,6,7)(19,28)(20,29)(22,27)(23,30)(25,32)(26,31)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.