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