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