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