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