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