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