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