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