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