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