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