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