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