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