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