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