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