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