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