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