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