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