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