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