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