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