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