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