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