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