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