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