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