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