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