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