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)(11,16)(12,14)(13,15)(17,18,23,26)(19,20,24,31)(21,32,22,25)(27,29,30,28)(2,5)(6,8)(17,18,23,26)(19,27,24,30)(20,29,31,28)(21,25,22,32)(9,11,13,12)(10,14,15,16)(17,19)(18,20)(21,28)(22,29)(23,24)(25,30)(26,31)(27,32)(9,12,13,11)(10,14,15,16)(17,20)(18,24)(19,26)(21,27)(22,30)(23,31)(25,28)(29,32)(1,3,4,7)(2,6,5,8)(17,21,23,22)(18,25,26,32)(19,28,24,29)(20,30,31,27)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.