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