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