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)(13,15)(14,16)(17,18,23,20)(19,24,27,28)(21,25,31,30)(22,29,32,26)(1,3,7,6)(2,4,8,5)(9,11,14,13)(10,15,16,12)(17,19)(18,24)(20,28)(21,26)(22,25)(23,27)(29,31)(30,32)(1,4,7,5)(2,3,8,6)(18,20)(19,27)(25,30)(26,29)(2,8)(4,5)(9,12,14,15)(10,13,16,11)(17,20,23,18)(19,28,27,24)(21,25,31,30)(22,29,32,26)(1,5,7,4)(2,3,8,6)(9,13,14,11)(10,15,16,12)(17,21)(18,25)(19,29)(20,30)(22,28)(23,31)(24,32)(26,27)(1,6,7,3)(2,5,8,4)(9,10)(11,15)(12,13)(14,16)(17,22)(18,26)(19,25)(20,29)(21,24)(23,32)(27,30)(28,31)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.