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