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