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