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)(19,22)(20,24)(21,25)(23,26)(27,32)(28,31)(29,30)(1,3,5,4)(2,6,7,8)(17,19,22,18)(20,28,21,30)(23,26,32,27)(24,29,25,31)(9,11,12,16)(10,13,14,15)(17,20,22,21)(18,24,19,25)(23,31,32,29)(26,28,27,30)(1,4,5,3)(2,6,7,8)(18,19)(20,29)(21,31)(23,32)(24,28)(25,30)(17,21,22,20)(18,25,19,24)(23,29,32,31)(26,30,27,28)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.