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