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