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