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