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