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