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