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