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