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