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