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