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