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)(17,18,22,27)(19,25,20,24)(21,26,30,31)(23,28,29,32)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,19)(18,24)(20,22)(21,29)(23,30)(25,27)(26,28)(31,32)(9,12,13,11)(10,14,15,16)(17,20,29,21,22,19,23,30)(18,25,32,31,27,24,28,26)(17,21,29,19,22,30,23,20)(18,26,32,25,27,31,28,24)(1,3,4,7)(2,6,5,8)(18,27)(24,25)(26,31)(28,32)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.