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