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