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