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