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