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