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