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