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