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