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