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)(11,15)(12,13)(14,16)(17,18,22,26,23,25,21,19)(20,24,28,32,29,31,30,27)(1,3,4,8)(2,5,6,7)(10,13)(14,15)(17,19,21,25,23,26,22,18)(20,24,28,32,29,31,30,27)(10,13)(14,15)(17,20,22,28,23,29,21,30)(18,24,26,32,25,31,19,27)(2,6)(5,7)(9,11,12,16)(10,14,13,15)(18,25)(19,26)(24,31)(27,32)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.