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